Free Plan · Daily quota 50,000 chars

Turn Text into MP3 Voice

Paste your text, choose a voice, then generate audio. Preview online or download MP3, up to 10,000 characters per request.

探索 600+ AI 音色 →
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Select text first, then insert a tag to wrap the current selection automatically.

0 / 10,000 chars Daily quota: 50,000 chars

Select Voice

Find the right voice faster

Filter by language and gender, then search by voice name or keyword before fine-tuning style and role.

0 voices
Basic Filters
Voice Capabilities
Style, role, intensity, and target language will appear here when the selected voice supports them.
Selected Voice

No voice selected

Choose a voice from the filters above to preview its capabilities.

Current Config
Suggested flow
Choose a language Search or pick a voice Adjust style or role if supported
Style, role, and target language will appear here when available.

常用语音工具入口

优先从 AI 配音、自然音色库和创作者专题页开始；需要字幕或素材整理时，再进入字幕/转写工作流。

TTS

免费语音合成

输入文案选择自然音色，生成可在线试听和下载的 AI 配音。
CLONE

AI 声音克隆

上传参考音或选用社区音色，生成更贴近目标声线的超拟真配音。
VOX

AI 音色库

浏览 YouTube、有声书、播客、中文旁白和 DragonHD 等高价值音色分类。
YT

YouTube 配音生成器

为教程、解说、Shorts、评测和无真人出镜频道生成旁白。
TIME

播报时长估算

输入脚本文案和语速，估算配音、旁白和短视频播报时长。
SRT

字幕/转写工作流

把音频或视频转成 TXT、SRT、VTT，用于字幕、笔记或配音脚本。
AI

AI 语音生成器

生成短视频旁白、课程配音和产品演示语音。
ANN

通知播报音生成

把门店提醒、系统提示和客服语转成可下载语音。

创作者配音专题入口

当你要制作中文脚本配音、YouTube 旁白、TikTok/Shorts 短视频配音、有声书、播客或更高质感的 DragonHD 音色时，可以从对应专题页进入。

ZH

中文 AI 配音生成器

为短视频、课程、产品演示和客服提示生成普通话配音音频。
CLONE

AI 声音克隆

固定人设与品牌声线：用参考音克隆，或从社区音色库快速开配。
YT

YouTube 配音生成器

为教程、解说、测评、Shorts 和无人出镜频道生成旁白 MP3。
TT

TikTok 配音生成器

把开场钩子、带货脚本和短视频旁白转换成可下载的 AI 配音。
YT

YouTube AI 音色

对比适合教程、解说、测评和无人出镜频道的创作者旁白音色。
AB

有声书旁白音色

查找适合故事、课程旁白、长脚本和文章朗读的稳定叙述音色。
HD

DragonHD 高清音色

浏览更高保真度的中文和英文音色，用于更精细的成片配音。

Core Features

An all-in-one voice processing platform covering the complete workflow from speech recognition to voice synthesis.

TTS

AI Text to Speech

Supports multiple voices, styles, role play, and emotion intensity for short-form dubbing, notifications, audiobooks, and everyday narration.

SPK

Speaker Diarization

Intelligently distinguishes different speakers and auto-labels roles, ideal for multi-person meetings and interview recordings.

100

100+ Natural Voices

Offering over 100 high-quality natural voices across Chinese, English, Japanese, and more, ready to synthesize directly in the browser.

SRT

SRT / VTT Subtitle Export

One-click export of professional SRT, VTT subtitle files with precise timestamps and plain text TXT, ready for video editing software.

SEC

Privacy & Security

We adopt a 'use-and-delete' data policy. All audio files are automatically deleted after processing. We never store user data or use it for AI training.

FREE

Free Plan · Ready to Use

No registration required. Core features are available on the free plan, and higher quotas can be unlocked for long-form or high-frequency usage. Just open your browser and start.

How It Works

Complete speech-to-text or text-to-speech in just three steps, no software installation required.

1

Upload File / Enter Text

Drag and drop audio files to the upload area, or paste text content into the text box for voice synthesis.

2

AI Auto Processing

Cloud-based AI engine processes instantly, with speaker diarization and time-aligned transcription.

3

Preview & Download

Preview and edit results online, then export SRT / VTT / TXT subtitles or audio files with one click.

Use Cases

Whether for short-video dubbing, audiobooks, notification playback, or meeting transcription, VoiceIndex AI handles voice processing efficiently.

MEET

Meeting Minutes

Upload meeting recordings, auto-transcribe with speaker identification, and generate timestamped meeting notes.

SRT

Video Subtitles

Extract audio from videos and generate SRT/VTT subtitle files, ready to import into Premiere, Final Cut, and other editing software.

BOOK

Audiobook Production

Convert long-form text into natural voice narration with adjustable speed, pitch, and volume for easy audiobook creation.

VID

Social Media Dubbing

Quickly generate AI voiceovers for TikTok, YouTube, and other platforms. Choose from 100+ voices with free-plan access and no-watermark exports.

Typical Use Cases

These are common tasks VoiceIndex AI is designed to support: fast voice testing, clear announcements, long-form narration, and content production.

FAQ

Can I use VoiceIndex AI for free?

Yes. VoiceIndex AI includes a free plan with no registration required. Text to speech includes a daily free quota of 50,000 characters and up to 10,000 characters per synthesis. Higher quotas are available for long-form or high-frequency usage.

What file formats are supported?

We support common audio and video formats including MP3, WAV, M4A, MP4, MOV, etc. We recommend uploading clear audio for best results.

Is my data safe?

Very safe. We adopt a 'use-and-delete' policy: audio files are only used for recognition and are automatically deleted from the server after processing. We will never store or train on your data.

How is the recognition accuracy?

Accuracy can reach over 98% under standard clarity. It supports speaker diarization, automatically distinguishes different speakers, and generates SRT subtitles with timestamps.

How do I export results?

You can preview and edit directly on the webpage. After completion, you can copy the text with one click, or download it as TXT or SRT subtitle files.

Is there a file length limit?

We currently support processing single files up to 1 hour long. For longer videos, we recommend uploading them in segments to ensure processing speed.

Why does my generated audio sound like a robot?

Using appropriate punctuation (such as commas, periods, and exclamation marks) in the text can make the generated speech more natural and expressive.

How can I make the generated speech more natural?

Select an appropriate voice for different scenarios: choose a mature and steady voice for formal occasions, and a lively and bright voice for children's content.

How do I generate speech in multiple languages?

When generating speech in multiple languages, ensure the text is written in the correct language and avoid mixing multiple languages within a single request.

What is emotion intensity?

Emotion intensity controls how strongly the selected voice style is expressed. Low sounds more natural and restrained, High fits most normal narration, and Very High works better for stronger emotions in short videos, ads, or notifications.

Why don't some voices show emotion intensity or role play?

Because different voices support different capabilities. Emotion intensity is shown only for voices that support style, and role play is shown only for voices that support role options.

How should I choose emotion intensity?

Start with Low if you want a more natural tone. High is enough for most everyday narration and standard dubbing. Use Very High only when you want a more dramatic or expressive result.

What are phoneme and liaison tags?

They are text tags used to fine-tune pronunciation. A phoneme tag helps specify how a character should be pronounced, while a liaison tag makes adjacent words connect more naturally. In normal use, just select the text first and click the corresponding button. The system inserts the tag automatically, so you do not need to write it by hand.

Are SSML and pause tags supported?

Yes. The text box supports SSML and extension tags, such as <break time="1s"/> for pauses and <mstts:ttsbreak strength="none">product name</mstts:ttsbreak> for smoother phrase connection. Some advanced tags may depend on the selected voice, so test with a short sentence first.

VoiceIndex AI Guide: Improve Content Workflows with AI Text to Speech and Speech Recognition

Video creators, podcasters, educators, and office teams often need to move between scripts, audio, transcripts, and subtitle files. VoiceIndex AI provides text-to-speech, speech-to-text, and subtitle export tools for short-video narration, course voiceovers, meeting notes, interview cleanup, and notification audio. For important content, prepare a clear script or clean recording first, then review the result before publishing.

Which AI voice tasks is VoiceIndex AI useful for?

If you need a quick narration draft, a course explanation, or a store announcement, you can generate a preview in VoiceIndex AI and then adjust pacing, pauses, and voice choice. Key capabilities include:

  • Multiple voices: Choose from natural Chinese, English, Japanese, and other voices for narration, announcements, lessons, and everyday reading.
  • Voice controls: Adjust speed, pitch, volume, and selected SSML pause settings to better match your script.
  • Transcription and subtitles: Upload audio or video to create editable transcripts and export TXT, SRT, or VTT files.

How to get better text-to-speech results

Stable voice output starts with a clean script. Keep punctuation, avoid overly long sentences, and check numbers, acronyms, brand names, and technical terms separately. Before publishing, generate a short preview first to confirm that the speed and pauses fit your target platform.

Export SRT subtitles and reduce editing work

When using speech to text, VoiceIndex AI can return plain text or export timestamped .srt and .vtt files. You can import those subtitles into Premiere Pro, Final Cut Pro, DaVinci Resolve, CapCut, or similar editors, then review line breaks and timing against the final video.

Explore More Tutorials

These tutorials are organized around practical voice, subtitle, and editing workflows:

About VoiceIndex AI

An AI voice tool for creators and office workflows

VoiceIndex AI provides text to speech, speech to text, and subtitle export tools for short-video voiceovers, course narration, meeting notes, interviews, and notification audio. Our goal is to help users finish voice tasks directly in the browser without installing software.

Clear Free Limits

Text to speech includes a daily free quota of 50,000 characters and up to 10,000 characters per synthesis. Contact us if you need higher quotas for long-form or frequent usage.

Privacy Focused

Uploaded content is used only to complete the current voice task. We do not use user content for AI training, and processed files are cleaned according to our retention rules.

Reachable Team

For issues, trials, support, or partnerships, you can reach us through the email and contact options listed on the site.

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